DE8704276U1 - Device for removing halogenated hydrocarbons from contaminated natural water sources, soil and/or the atmosphere - Google Patents
Device for removing halogenated hydrocarbons from contaminated natural water sources, soil and/or the atmosphereInfo
- Publication number
- DE8704276U1 DE8704276U1 DE8704276U DE8704276U DE8704276U1 DE 8704276 U1 DE8704276 U1 DE 8704276U1 DE 8704276 U DE8704276 U DE 8704276U DE 8704276 U DE8704276 U DE 8704276U DE 8704276 U1 DE8704276 U1 DE 8704276U1
- Authority
- DE
- Germany
- Prior art keywords
- housing
- halogenated hydrocarbons
- atmosphere
- soil
- natural water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 150000008282 halocarbons Chemical class 0.000 title claims description 16
- 239000008239 natural water Substances 0.000 title claims description 3
- 239000002689 soil Substances 0.000 title description 6
- 239000000203 mixture Substances 0.000 claims description 11
- 230000005855 radiation Effects 0.000 claims description 8
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 9
- 239000007789 gas Substances 0.000 description 9
- 229930195733 hydrocarbon Natural products 0.000 description 6
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical group ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 description 5
- 150000002430 hydrocarbons Chemical class 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- UBOXGVDOUJQMTN-UHFFFAOYSA-N trichloroethylene Natural products ClCC(Cl)Cl UBOXGVDOUJQMTN-UHFFFAOYSA-N 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- CYTYCFOTNPOANT-UHFFFAOYSA-N Perchloroethylene Chemical group ClC(Cl)=C(Cl)Cl CYTYCFOTNPOANT-UHFFFAOYSA-N 0.000 description 4
- 239000003673 groundwater Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 229950011008 tetrachloroethylene Drugs 0.000 description 4
- 244000309464 bull Species 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- -1 trichloroethylene, tetrachloroethylene, 1,1,1-trichloroethane Chemical class 0.000 description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 2
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- UOCLXMDMGBRAIB-UHFFFAOYSA-N 1,1,1-trichloroethane Chemical compound CC(Cl)(Cl)Cl UOCLXMDMGBRAIB-UHFFFAOYSA-N 0.000 description 1
- 241000251468 Actinopterygii Species 0.000 description 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 239000010868 animal carcass Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 150000008280 chlorinated hydrocarbons Chemical class 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000006298 dechlorination reaction Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 239000002274 desiccant Substances 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000003925 fat Substances 0.000 description 1
- 239000000796 flavoring agent Substances 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 229910000039 hydrogen halide Inorganic materials 0.000 description 1
- 239000012433 hydrogen halide Substances 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 210000003734 kidney Anatomy 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 210000004185 liver Anatomy 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 210000000653 nervous system Anatomy 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 239000003380 propellant Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
- C02F1/325—Irradiation devices or lamp constructions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
- B01J19/12—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electromagnetic waves
- B01J19/122—Incoherent waves
- B01J19/123—Ultraviolet light
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/002—Reclamation of contaminated soil involving in-situ ground water treatment
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D2203/00—Aspects of processes for making harmful chemical substances harmless, or less harmful, by effecting chemical change in the substances
- A62D2203/10—Apparatus specially adapted for treating harmful chemical agents; Details thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Soil Sciences (AREA)
- Organic Chemistry (AREA)
- Water Supply & Treatment (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Analytical Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Health & Medical Sciences (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Treating Waste Gases (AREA)
- Physical Water Treatments (AREA)
Description
• &bgr; * ·•&bgr; * ·
- 2- 2
Die Neuerung betrifft eine Vorrichtung zur Entfernung von halogenierten C,- bis CU-Kohlenwasserstoffen aus damit verunreinigten natürlichen Wassrvorkommen, dem Erdboden und/oder der Atmosphäre. .The innovation concerns a device for removing halogenated C1 to CU2 hydrocarbons from contaminated natural water sources, the ground and/or the atmosphere.
Es ist bekannt, daß nahezu die gesamte hergestellte Menge von halogenierten, insbesondere chlorierten C,- bis C--Kohlenwasserstoffen im folgenden CKW genannt, unter diesen insbesondere Trichlorethylen, Tetrachlorethylen, 1,1,1-Trichlorethan und Dichlormethan, die in Industrie und Gewerbe sowie im Haushalt Anwendung als Fettloser insbesondere bei der Metallreinigung und -trocknung, bei der. Herstellung von Lacken und Farben, Abbeizmittel &eegr;, Klebstoffen, zur Reinigung, zur Herstellung von Leitplatten für Computer, in der Druckindustrie, zum Herstellen von Aromen und Extrakten, zur Textil- und Lederreinigung, zum Extrahieren von Fetten bei der Tierköroerverwertung usw. Verwendung finden, in die Atmosphäre oder &aacgr;-en Boden abgegeben werden, wobei sie in nicht unerheblichem Maßp auch in das Grundwasser gelangen. Bei mehr als 200 000 t CKW Jahresproduktion in der Bundesrepublik sind bereits jetzt Grundwasserkontaminationen von 1 bis 1 Mio. /jg/&iacgr; und Luft kontaminationen von 10 bis 4 Mio. ^jg/rn je nach Lage und Art des CKW gefunden worden, wobei Trichlorethylen und Tetrachlorethylen wegen des günstigen Preises und der universellen Einsetzbarkeit überwiegen. Hierbei werden die größten Mengen (ca. 2/3) in die Atmosphäre, ca. 1/3 über die Abfälle und 1-3 % über Abwässer an die Umwelt abgegeben. Auch die Menge von z.B. chlorfluorierten C«·· bis C,-Kohlenwasserstoffen, die z.B. als Treibmittel oder Kühlmittel Verwendung finden, ist erheblich in der Umwelt zu finden.It is known that almost the entire quantity of halogenated, particularly chlorinated C1 to C- hydrocarbons (hereinafter referred to as CHCs), including in particular trichloroethylene, tetrachloroethylene, 1,1,1-trichloroethane and dichloromethane, which are used in industry, commerce and the home as degreasers, particularly in metal cleaning and drying, in the manufacture of varnishes and paints, paint strippers, adhesives, for cleaning, in the manufacture of circuit boards for computers, in the printing industry, for the manufacture of flavourings and extracts, for textile and leather cleaning, for extracting fats from animal carcass processing, etc., are released into the atmosphere or soil, with a not inconsiderable amount also reaching the groundwater. With more than 200,000 tonnes of CHCs produced annually in Germany, groundwater contamination of between 1 and 1 million tonnes per year has already been reported. and air contamination of 10 to 4 million µg/m³ depending on the location and type of CHC has been found, with trichloroethylene and tetrachloroethylene predominating due to their low price and universal applicability. The largest quantities (approx. 2/3) are released into the atmosphere, approx. 1/3 via waste and 1-3 % into the environment via waste water. The amount of chlorofluorinated C«·· to C, hydrocarbons, which are used as propellants or coolants, is also found in the environment in considerable quantities.
Wegen der relativen Stabilität, die Von ca.- 6 Jähren· Halbwertszeit beim 1J,ii-Trichlörmethart bis zu etwa 3 Tagen Halbwertszeit bei Trichlorethylen reichtj .und der Joxizitat insbesondere auf das Nervensystem, Leber und Niere (LC50-Werte von 5 bis 200 mg/1 bei Fischen) kommt der Beseitigung der CKW und anderer Halogenkohlenwasserstoffe aus der Umwelt eine hohe Bedeutung zu.Because of their relative stability, which ranges from a half-life of about 6 years for 1J,ii-trichothermal energy to a half-life of about 3 days for trichloroethylene, and their toxicity, particularly to the nervous system, liver and kidneys (LC 50 values of 5 to 200 mg/l in fish), the removal of CHCs and other halogenated hydrocarbons from the environment is of great importance.
Hierbei wurde bisher das festgestellte Vorkommen von z.B. CKW befreit und die mehr oder weniger vollständig isolierten CKW verbrannt, was auf Schiffen auf hoher See erfolgt, da das gebildete Chlorwasserstoffgas schlecht j an Land absorbiert werden kann.To date, the identified deposits of, for example, CHCs have been removed and the more or less completely isolated CHCs have been burned, which is done on ships on the high seas, since the hydrogen chloride gas produced cannot be easily absorbed on land.
Eine andere, noch häufiger angewendete Methode ist das J Abblasen der aus dem Boden, dem Wasser oder aus Produktionsanlagen isolierten Halogenkohlenwasserstoffe in die Atmosphäre oder die Absorption an Aktivkohle* Wird jedoch Halogenkohlenwasserstoff enthaltendes Wasser direkt mit Aktivkohle behandelt, so gelingt das nachfolgende Desorbieren der Halogenkohlenwasserstoffe nur schwer, z.B. mit Heißdampf. Auch die Adsorption der Gemische mit Wasser gelingt nur in geringem Maße. Beim Abblasen oder Abstreifen der Halogenkohlenwasserstoffe in die Atmosphäre wird zwar im Einzelfall die Rieht- oder f. Grenzwertkonzentration eingehalten, aber die Umweltbelastung ist offensichtlich und unerwünscht.Another, even more frequently used method is to blow off the halogenated hydrocarbons isolated from the soil, water or production plants into the atmosphere or to absorb them on activated carbon.* However, if water containing halogenated hydrocarbons is treated directly with activated carbon, the subsequent desorption of the halogenated hydrocarbons is difficult, e.g. with hot steam. The adsorption of the mixtures with water is also only successful to a limited extent. When the halogenated hydrocarbons are blown off or stripped into the atmosphere, the guideline or limit concentration is met in individual cases, but the environmental impact is obvious and undesirable.
Im übrigen bilden manche CKW mit Alkalimetallen oder JjIn addition, some CHCs form with alkali metals or Jj
deren Hydroxiden sowie mit Luft expliostonsfähige Genii- ftheir hydroxides and air-explosive genii- f
sehe, was die Isolierung erschwert.see what makes isolation difficult.
t t t - ttt-
tutdoes
Zwar sind einzelne GKWy Wie das Dichlormethan mikrobieil »bbäUbar, andere jedoch nicht u'ild wandern in den Böden Und dann in das Grundwasser ein* Wegen des relativ geringen Dampfdrucks sind sie zwar zusammen mit Luft aus dem Boden äbpumpbär, aber das CKW-LUf ta<aemisch ist schwierig Weiter zu verarbeiten ufid wird daher meist in die Atmosphäre abgeblasen und belastet diese*Although some CHCs, such as dichloromethane, are microbially biodegradable, others are not and migrate into the soil and then into the groundwater. Because of their relatively low vapor pressure, they can be pumped out of the soil together with air, but the CHC air is difficult to process further and is therefore usually released into the atmosphere, polluting it.
Ein weiteres bekanntes Verfahren zur Entfernung von halogenierten Kohlenwasserstoffen besteht darin* daß man die halogenierten Kohlenwasserstoffe zusammen mit Wasserstoff, vor·^ zugsweise in alkalischer Lösung, ainer UV-Strahlung mit zur vollständigen Zersetzung ausreichenden Energie unterwirft und die gebildeten Gase, nämlich CO2, CO, Kohlenwasserstoffe und Halogenwasserstoff in an sich bekannter Weis-e eliminiert, Der UV-Wellenlängenbereich beträgt insbesondere 230 bis ♦00 nm.Another known process for removing halogenated hydrocarbons consists in subjecting the halogenated hydrocarbons together with hydrogen, preferably in alkaline solution, to UV radiation with sufficient energy for complete decomposition and eliminating the gases formed, namely CO 2 , CO, hydrocarbons and hydrogen halide in a manner known per se. The UV wavelength range is in particular 230 to 400 nm.
Dieses Verfahren hat aber wegen der explosiven wasserstoffhaltigen Gasgemische erhebliche Risiken.However, this process involves considerable risks due to the explosive hydrogen-containing gas mixtures.
Die Neuerung betrifft nun eine Vorrichtung zur Durchführung tines solchen Verfahrens, insbesondere zur Entfernung von halogenieren Kohlenwasserstoffen aus damit verunreinigter Wasservorkommen, dem Erdboden und|oder der Atmosphäre, bestehend aus einer in einem geschlossenen Gehäuse, das mit Durchströmungseinrichtungen für ein Luft und die halogenierten Kohlenwasserstoffe enthaltendes Gasgemisch versehen 1st, angeordneten UV-Lichtquelle, die dadurch gekennzeichnet 1st, daß ein Bündel von mindestens zwei UV-Strahlernin Röhrenfonr. in dem Gehäuse an dessen Innenwand angeordnet ist, die den Gasstrom durch das Gehäuse umgeben.The innovation now relates to a device for carrying out such a process, in particular for removing halogenated hydrocarbons from water sources contaminated with them, the ground and/or the atmosphere, consisting of a UV light source arranged in a closed housing which is provided with flow devices for a gas mixture containing air and the halogenated hydrocarbons, which is characterized in that a bundle of at least two UV lamps in tube form is arranged in the housing on its inner wall, which surround the gas flow through the housing.
Vorzugsweise werden zur Entfernung von z.B. Trichlorethylen, Tetrachlorethylen, 1,1,1-Trichlorethan und Dichlormetfran Strahler mit einer UV-Strahlung im Wellen!ängenbereichPreferably, for the removal of e.g. trichloroethylene, tetrachloroethylene, 1,1,1-trichloroethane and dichloromethane, lamps with UV radiation in the wavelength range
• i &iacgr; i · • i &iacgr; i ·
ill » · >ill » · >
till » O » Ii < i 9 9 ·till » O » Ii < i 9 9 ·
&iacgr;&iacgr; 230 bis 400 nm mit einen UV-Licht>Le1stüng von 15 W eingesetzt *&iacgr;&iacgr; 230 to 400 nm with a UV light output of 15 W used *
Insbesondere werden Strahler mit einer kurzwelligen UV-Strahlung von 210 bis 270 nm verwendet.In particular, lamps with short-wave UV radiation of 210 to 270 nm are used.
Vorzugsweise werden die röhrenförmigen Strahler längs der Innenwände des Gehäuses, das rund oder eckig, z.B. viereckig sein kann, in einer Anzahl angeordnet, daß ein ausreichender Abstand zwischen den Röhren und vom Gasstrom eingehalten wird, der eine überflüssige Mehrleistung einerseits und eine Störung des Gasstroms andererseits verhindert. Beispielsweise reichen 4 bis 16 Strahler in einem Gehäuse aus, um 10 bis 200 m31h eines Gemisches aus Luft und C,-C--Chlorkohlenwasserstoffen zu dechlorieren. Das entstandene Spaltgemisch, das insbesondere Halogenwasserstoff, Kohlenwasserstoffe, CO und CO2 enthält, kann dann z.B. durch eine Kalklauge bzw. einen Turm mit festem Stückkalk geleitet und noch einmal mit UV-Strahlung behandelt und ggf. ein weiteres mal absorbiert werden, bis lediglich CO2 und gegebenenfalls kleine Mengen Methan, Ethan und|oder Ethen übrig geblieben sind, die an die Luft abgegeben oder weiter verbrannt werden können.Preferably, the tubular radiators are arranged along the inner walls of the housing, which can be round or square, e.g. square, in such a number that a sufficient distance is maintained between the tubes and the gas flow, which prevents unnecessary additional power on the one hand and disruption of the gas flow on the other. For example, 4 to 16 radiators in a housing are sufficient to dechlorinate 10 to 200 m 3 1h of a mixture of air and C1-C--chlorinated hydrocarbons. The resulting dechlorination mixture, which contains in particular hydrogen halides, hydrocarbons, CO and CO 2 , can then, for example, be passed through a lime solution or a tower with solid lump lime and treated again with UV radiation and, if necessary, absorbed once more, until only CO 2 and, if necessary, small amounts of methane, ethane and/or ethene remain, which can be released into the air or further burned.
Hierbei sind keine Rückstände zu befürchten. Dasgebildete Calciumchlorid kann entwässert und als Trockenmittel verwendet oder direkt zur Herstellung von anderen Chemikalien verwendet werden, die z.B. im Umweltschutz Anwendung finden .There is no risk of residues. The calcium chloride formed can be dehydrated and used as a drying agent or used directly to produce other chemicals that are used in environmental protection, for example .
Das Abpumpen &ngr;&ogr;&eegr; Luft-CKW-Gemisehen aus dem Boden ist relativ einfach und kann schon mit 20 bis 25 mbar Unterdruck erfolgen. Mit einer kleineren Pumpe können in der Größenordnung von 500 bis 1000 m /h Luft herausgepumpt und dann erfindungsgemäß auf einen Halogenkohlenwasserstoffgehalt ynter lOOugJm gebracht werden.Pumping air-CHC mixtures out of the ground is relatively simple and can be done with a vacuum of just 20 to 25 mbar. With a smaller pump, air can be pumped out at a rate of 500 to 1000 m3 /h and then, according to the invention, reduced to a halogenated hydrocarbon content of less than 1000 m3.
" &iacgr; * J ·' · it &mgr; * "&iacgr; * J ·' · it &mgr; *
Durch Verdüsen von Wasser kann eine 98SSige Reinigung von Halogen-KW erfolgen» Der Richtwert Von unter 25 ug/1 H2O kann leicht eingehalten werden, Wenn die dabei beiästete Luft neueriings.gemäß gefeinigt wird.By spraying water, a 98% purification of halogen HC can be achieved. The guideline value of less than 25 ug/1 H 2 O can easily be maintained if the air thus exposed is cleaned accordingly.
Die Neuerung wird durch die beigefügte Zeichnung näher erläutert, die eine teilweise im Schnitt dargestellte Auf·' sieht auf eine Vorrichtung gemäß der Neuerung darstellt.The innovation is explained in more detail by the attached drawing, which shows a partially sectioned view of a device according to the innovation.
Hierbei ist ein viereckiges Gehäuse aus sinem Rahmen mit einem Außenmatitel 2 und einem Innenmantel 8 gebildet und mit einem Deckel 3 mit Verschlußschnallen 6 für die Wartung des im Inneren des Gehäuses vorgesehenen UV-strahier 10 versehen. Die Strahlerfassungen 9 befinden sich innerhalb der Doppelwandung des Gehäuses aus Korrosionsschutzgründen. Der Deckel 2 ist mit einem Dichtungsring 7 versahen. Der Gas strom aus Luft und dem Gemisch aus halogaiierten, insbesondere chlorierten Kohlenwasserstoffen tritt in die Eintritts-^ öffnung 4 ein, durchströmt den Raum zwischen den UV-Strahlern 10 und strömt aus der Austrittsöffnung 5 aus.Here, a square housing is formed from a frame with an outer diameter 2 and an inner casing 8 and is provided with a cover 3 with locking buckles 6 for the maintenance of the UV emitter 10 provided inside the housing. The beam holders 9 are located inside the double wall of the housing for corrosion protection reasons. The cover 2 is provided with a sealing ring 7. The gas flow consisting of air and the mixture of halogenated, in particular chlorinated, hydrocarbons enters the inlet opening 4, flows through the space between the UV emitters 10 and flows out of the outlet opening 5.
Zur Speisung der Strahler dient ein in einem Schaltkasten außerhalb der Gehäuses angebrachter Stromanschluß 13 mit Elementschalter 12 und den erforderlichen Drosseln und Kondensatoren für die UV-Strahler.The lamps are supplied with power by a power connection 13 in a switch box outside the housing with an element switch 12 and the required chokes and capacitors for the UV lamps.
Die folgenden Beispiele erläutern die Leistungsfähigkeit der neuerungsgemäßen Vorrichtung,The following examples illustrate the performance of the innovated device,
t I t C <t I t C <
Bei spiel 1Example 1
3 33 3
60 mg|m Tetrachlorethen , 200 mg|m Trichiorethen und 160 mg|m tetrachloroethylene, 200 mg|m trichloroethylene and 1 mgjm eis-Dichiorethen aus ca. 10 m Tiefe mittels einer in den Boden gebrachten Sonde mit einem Unterdruck von 25mgjm ice-dichloroethene from a depth of about 10 m using a probe placed in the ground with a negative pressure of 25
•3•3
mbar Luft mit einer Förderleistung von 60 m |h abgepumpt. Das Gemisch aus Luft und den chlorierten Kohlenwasserstoffen wurde durch die neuerungsgemäße Vorrichtung geleitet, in der sich 16 UV-Röhren mit je ca. 15W UV-Strahlung befanden. Das austretende Gas von 650C wurde analysiert. Es enthielt neben HCl und CO2 nur noch 10 % des Tetrachlorethylens, 8 % des Trichlorethens und 20 % des eis-Diehlorethens .mbar of air was pumped out at a rate of 60 m |h. The mixture of air and chlorinated hydrocarbons was passed through the new device, which contained 16 UV tubes, each with approx. 15W UV radiation. The escaping gas at 65 0 C was analyzed. In addition to HCl and CO 2, it contained only 10 % of tetrachloroethylene, 8 % of trichloroethylene and 20 % of cis-diechloroethylene.
Gemäß Beispiel 1 wurde ein aus verunreinigtem Grundwasser abgestreiftes Gemisch aus Luft und haiogenierten Kohlenwasserstoffen von 3O0C noch 190 m |h einer UV-Strahlung unterworfen. Die Anfangs- und Endgehalte an einigen markanten haiogenierten Kohlenwasserstoffen gehen aus folgender Tabelle hervor:According to Example 1, a mixture of air and halogenated hydrocarbons stripped from contaminated groundwater was subjected to UV radiation at 30 0 C for 190 m /h. The initial and final contents of some prominent halogenated hydrocarbons are shown in the following table:
1,1,1-Trichlorethan 600 000 56 % 1,1,1-Trichloroethane 600 000 56 %
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE8704276U DE8704276U1 (en) | 1987-03-21 | 1987-03-21 | Device for removing halogenated hydrocarbons from contaminated natural water sources, soil and/or the atmosphere |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE8704276U DE8704276U1 (en) | 1987-03-21 | 1987-03-21 | Device for removing halogenated hydrocarbons from contaminated natural water sources, soil and/or the atmosphere |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE8704276U1 true DE8704276U1 (en) | 1987-08-06 |
Family
ID=6806167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE8704276U Expired DE8704276U1 (en) | 1987-03-21 | 1987-03-21 | Device for removing halogenated hydrocarbons from contaminated natural water sources, soil and/or the atmosphere |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE8704276U1 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3903549A1 (en) * | 1989-02-07 | 1990-08-09 | Int Biotech Lab | UV light for the degradation of pollutants, in particular of halogenated hydrocarbons |
| EP0424865A2 (en) * | 1989-10-25 | 1991-05-02 | SPRINTSYSTEM GMBH GESELLSCHAFT FÜR SANIERUNGSTECHNIK, ORGANISATION UND WEITERBILDUNG & CO. | Removal of dioxins and furans |
| EP0430370A2 (en) * | 1989-12-01 | 1991-06-05 | ENIRICERCHE S.p.A. | Process for purifying contaminated soil |
| DE4000369A1 (en) * | 1990-01-09 | 1991-07-11 | Layer & Knoedler Abwassertechn | METHOD AND DEVICE FOR WATER TREATMENT |
| DE4114522A1 (en) * | 1990-05-04 | 1991-11-07 | Spectronix Ltd | METHOD AND DEVICE FOR PROVIDING ECOLOGICAL PROTECTION AGAINST EQUIPMENT USING A HYDROGEN HYDROGEN |
| DE4016514A1 (en) * | 1990-05-22 | 1991-11-28 | Int Biotech Lab | Destruction of organic substances - esp. aromatic and/or halogenated cpds. in liq. or gases by irradiation with UV |
| DE4115177A1 (en) * | 1991-05-09 | 1992-11-12 | Ultra Systems Gmbh Uv Oxidatio | METHOD AND DEVICE FOR CLEANING SOLID SUBSTANCES WITH POLLUTANTS |
| EP0962237A1 (en) * | 1998-05-27 | 1999-12-08 | Erika Balle | Method for the disposal and valorisation of halogenated hydrocarbons |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3903549A1 (en) * | 1989-02-07 | 1990-08-09 | Int Biotech Lab | UV light for the degradation of pollutants, in particular of halogenated hydrocarbons |
| EP0424865A2 (en) * | 1989-10-25 | 1991-05-02 | SPRINTSYSTEM GMBH GESELLSCHAFT FÜR SANIERUNGSTECHNIK, ORGANISATION UND WEITERBILDUNG & CO. | Removal of dioxins and furans |
| EP0424865A3 (en) * | 1989-10-25 | 1991-11-13 | Sprintsystem Gmbh Gesellschaft Fuer Sanierungstechnik, Organisation Und Weiterbildung & Co. | Removal of dioxins and furans |
| EP0430370A2 (en) * | 1989-12-01 | 1991-06-05 | ENIRICERCHE S.p.A. | Process for purifying contaminated soil |
| EP0430370A3 (en) * | 1989-12-01 | 1991-12-04 | Eniricerche S.P.A. | Process for purifying contaminated soil |
| DE4000369A1 (en) * | 1990-01-09 | 1991-07-11 | Layer & Knoedler Abwassertechn | METHOD AND DEVICE FOR WATER TREATMENT |
| DE4114522A1 (en) * | 1990-05-04 | 1991-11-07 | Spectronix Ltd | METHOD AND DEVICE FOR PROVIDING ECOLOGICAL PROTECTION AGAINST EQUIPMENT USING A HYDROGEN HYDROGEN |
| DE4016514A1 (en) * | 1990-05-22 | 1991-11-28 | Int Biotech Lab | Destruction of organic substances - esp. aromatic and/or halogenated cpds. in liq. or gases by irradiation with UV |
| DE4115177A1 (en) * | 1991-05-09 | 1992-11-12 | Ultra Systems Gmbh Uv Oxidatio | METHOD AND DEVICE FOR CLEANING SOLID SUBSTANCES WITH POLLUTANTS |
| EP0962237A1 (en) * | 1998-05-27 | 1999-12-08 | Erika Balle | Method for the disposal and valorisation of halogenated hydrocarbons |
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